Open the position of the battery cover of the quality universal door remote control from China. (Some models are at the position of the function key of the flip cover). There will be a picture of the lock on the display screen.
Analysis and repair: Most of the reasons why all the buttons on the remote control do not work are due to damage to the crystal oscillator. If it has been dropped or checked with the radio and there is no "beep" sound at all, you can directly replace the crystal oscillator with a new one.
quality universal door remote control from China It is specially designed according to the fact that there are many types of air conditioners and it is difficult to match the damage of the remote control.
Customized universal door remote control products refer to a wireless transmitting and receiving device that can decode various remote control infrared signals, store the received infrared signals, and send infrared information again. According to the function, it can be roughly divided into air conditioner universal remote control, TV universal remote control, set-top box universal remote control, DVD/VCD remote control, 6-in-1 universal remote control, etc.